In a projection display system, a light-emitting diode (LED) can generate unpolarized light. A light guide can receive the unpolarized light from a perimeter of the light guide and guide the unpolarized light between a light emission surface and an opposing surface as guided light. The light guide can include a plurality of light-extraction features that can direct a portion of the guided light out of the light guide through the light emission surface as unpolarized emitted light. A polarizing film can reflect at least some of a first polarization state of the unpolarized emitted light into the light guide through the light emission surface and can transmit at least some of a second polarization state of the unpolarized emitted light through the polarizing film to form a polarized light beam. An angular reduction film can reduce a range of propagation angles of the polarized light beam.

A light-emitting panel is disclosed. The light-emitting panel may be a light-guide panel (LGP) that includes a light guide, a light source arranged to emit light into the light guide, and a frame arrayed around the light guide and light source. The frame has one or more magnets associated with it, typically arrayed along at least one portion, which may be an edge. The magnets provide both mechanical and electrical connection points, such that a second LGP of the same type brought adjacent to the first LGP will be both mechanically and electrically connected to the first LGP.

A series of interconnected (directly or indirectly), coupled lighting panels is provided, the coupled lighting panels linked to one another such that various shapes and designs can be created using various arrangements of the coupled lighting panels, the lighting panels of some embodiments adapted to avoid dark spots proximate to lighting circuitry disposed therein. The lighting panels can be luminaires, and may be provided in various geometric shapes, having various dimensionalities (e.g., a flat 2 dimensional shape, or a 3 dimensional shape). Various control systems, connectors, housings, frames, and lighting systems are also described.

A display device for a vehicle includes: a first transparent or translucent layer comprising a pictogram, a second transparent or translucent layer, covering the pictogram, a liquid crystal display, arranged in line with the pictogram, and a light source configured to emit light to illuminate the pictogram by passing through the liquid crystal display and the second layer. The liquid crystal display at least partially covers the second layer, and an assembly formed by the first layer and the second layer is rigid.

A backlight device is provided and include frame formed of sheet material including at least four bars; first adhesive layer provided on one surface of the bars; reflective sheet attached to frame with first adhesive layer; second adhesive layer is provided on another surface opposed to the one surface of the bars; optical member including lightguide plate disposed on reflective sheet in frame; and light source disposed in frame and configured to emit light to optical member, wherein thickness of second adhesive layer provided on three successive bars of frame along three sides of lightguide plate is greater than thickness of first adhesive layer provided on four bars of frame.

A light-emitting module manufacturing method of the present disclosure includes: providing a plurality of light sources each including a semiconductor layered structure and an electrode; providing a lightguide plate having a first principal surface to serve as a light extraction surface, a second principal surface opposite to the first principal surface, and a plurality of through holes penetrating through the lightguide plate from the first principal surface to the second principal surface; providing a light modulating member in each of the through holes; providing a plurality of bonding members on the light modulating member; equalizing heights of upper surfaces of the plurality of bonding members; placing the light sources on the bonding members such that the electrode faces away from the light modulating member; providing a cover member so as to cover the second principal surface; and forming an interconnect layer electrically coupled with the light sources.

The invention relates to a function display (1) for selectively displaying several symbols representing one switching function, respectively, and/or at least two switching states, respectively, comprising: a light guide stack which, given an attachment of the function display (1) as intended, forms a display surface (8) facing towards the observer (B); wherein the light guide stack is formed from at least two transparent or translucent, planar light guides (2, 3) arranged in an overlaid manner in a stacking direction, which are arranged so as to be spaced apart by a transparent or translucent layer consisting of a material that is optically thinner compared to the adjacent light guides (2, 3), preferably an air gap (14), so that the light guides (2, 3) each have a main surface (H) facing towards the observer (B) and a main surface (H′) facing away from the observer (B), and, in at least one light guide (2), the main surface (H′) facing away from the observer (B) faces towards a light guide (3) which is most closely adjacent in the opposite direction to the stacking direction;

at least one light source (5, 5′) per light guide (2, 3), which is arranged such that in each case, its light (L, L′), via an end face (11) of an associated light guide (2, 3) facing towards the light source (5, 5′), is coupled into the respective light guide (2, 3); wherein, further, at least one microstructured symbol area (12a, 12b) provided in or on the light guide (2, 3) is provided for each light guide (2, 3), which is configured, if the light source (5, 5′) is respectively activated, to be visible, illuminated by the light (L, L′) coupled into the light guide (2, 3), to the observer (B); a circuit board (7) on which the several light sources (5, 5′) are arranged and fixed; a panel (6) fixed to the light guide stack by substance-to-substance connection and/or non-positively and/or positively, to which the circuit board (7) is fixed while resting against a mounting surface (15), wherein two light sources (5′) of the circuit board serve as an alignment aid in attaching the circuit board (7) and the panel (6); and an associated assembly method.

An electronic assembly, such as an integrated circuit package, may be formed comprising a package substrate and a photonic integrated circuit device attached thereto, wherein the package substrate includes a heat dissipation structure disposed therein. A back surface of the photonic integrated circuit device may thermally coupled to the heat dissipation structure within the package substrate for the removal of heat from the photonic integrated circuit device, which allows for access to an active surface of the photonic integrated circuit device for the attachment of fiber optic cables and eliminates the need for a heat dissipation device to be thermally attached to the active surface of the photonic integrated circuit device.

A light box includes a first case, a second case, and a light emitting module. The first case includes an upper cover and a plurality of sidewalls, a first sidewall of the plurality of sidewalls has a horizontal light guiding slot. The second case includes a bottom plate. The upper cover, the bottom plate and the plurality of sidewalls form a storage space. The light emitting module is placed in parallel to the bottom plate in the storage space.

The lighting device disclosed in the embodiment of the invention includes a substrate including a metal layer; a plurality of light sources arranged in a first direction on the substrate; a plurality of protrusions having a length in the first direction on the metal layer; and a resin layer disposed on the plurality of light sources and the plurality of protrusions, wherein the metal layer includes a first metal layer electrically connected to the light source and a second metal layer coupled to the plurality of protrusions, and the first metal layer and the second metal layer are separated from each other, and the plurality of protrusions may be disposed to be spaced apart from each other in a second direction perpendicular to the first direction.